Auckland’s City Rail Link seeks more funding as pandemic drives up costs
https://www.railwaygazette.com/infrastructure/aucklands-city-rail-link-seeks-more-funding-as-pandemic-drives-up-costs/63755.article
The tunnel is the alternative route for Western Line.
It's surprising advance that there will be the underground rail, though Auckland just had diesel trains 10 years ago.
Auckland City didn't have a railway penetrating downtown. But, this tunnel will be the axis of transportation in downtown of Auckland.